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Plant Physiology Quiz 1 (25 MCQs)

Quiz Instructions

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1. When cell structure changes and allows cells to assume a variety of specific functions it is called
2. Trees that form vessels of uniform size throughout the growing season are called:
3. This component provides strength and rigidity in plant cell walls, especially in wood.
4. A slightly englarged portion of the twig, where leaves and buds arise is called:
5. What do arborists use to close stomata on trees during transplant? It also can reduce evaporative cooling of leaves, reduce CO2 uptake, and reduce photosynthesis
6. The xylem of angiosperms is composed of these 4 elements:
7. What two characteristics determine how a tree will grow and develop?
8. These are adaptations trees have made to survive in hot, dry climates:
9. When you trim the outermost layer of a plant, it will soon die. Why is this?
10. When roots are living in a symbiotic relationship with certain fungi that help the tree get essential minerals, it is called:
11. These are living cells that are located in the outer layers of the xylem. They store carbohydrates, defend against decay and provide structural function across the grain:
12. When an organism grows toward the sunlight it is called what?
13. Potatoes are commonly consumed in the modern diet. What part of the plant are they harvested from?
14. This tissue is composed of mostly living cells: sieve cells in conifers and; sieve tube elements with companion cells in hardwoods:
15. Storage, anchorage, conduction and absorption are all functions of what?
16. A tree that keeps it's leaves for more than one year is called a what?
17. This is the primary structural component of the cell wall
18. Found in hardwoods only, these are the primary conduction elements composed of stacks of dead, hollow cells that form long tubes:
19. The swollen area at the base of a branch is called the:
20. Where the branch and trunk expand against each other in the crotch and the bark gets pushed up is called the:
21. Trees that form wide vessels early in the season and narrower vessels later in the season are called
22. The area of the leaf stalk that enables leaf drop and protects the stem from dessication and pathogen entry.
23. This conductive tissue is composed of tracheids, fibers and parenchyma cells in gymnosperms
24. These provide a large surface area for absorbing sunlight & CO2. They also facilitate gas exchange.
25. These trees have only one apical meristem:
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